package com.nowcoder.community.controller;

import com.nowcoder.community.entity.DiscussPost;
import com.nowcoder.community.entity.Page;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Controller
public class HomeController {

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private UserService userService;

    @RequestMapping(path="/index",method = RequestMethod.GET)
    public String getIndexPage(Model model, Page page){
        //方法调用前  SpringMVC会自动实例化Model和Page，并将Page注入Model，
        //所以，在thymeleaf中可以直接访问Page对象中的数据
        page.setRows(discussPostService.findDiscussPostRows(0));
        page.setPath("/index");

       List<DiscussPost> list = discussPostService.findDiscussPosts(0,page.getOffset(),page.getLimit());
       List<Map<String,Object>> discussPosts = new ArrayList<>();
       if(list!=null){
           for(DiscussPost post:list){
               Map<String,Object> map = new HashMap<>();
               map.put("post",post);
               User user = userService.findUserById(post.getUserId());
               map.put("user",user);
               discussPosts.add(map);
           }
       }
       model.addAttribute("discussPosts",discussPosts);
        return "/index";
    }
}
